Community Water System · PWS AZ0405002
Graham County Utilities - Pima
Operator location Pima, Arizona - larger served population (> 3,309) at 3,799 people served; 152 SDWIS violations on record from groundwater sources.
- 3,799
- People served (this PWS)
- 152
- EPA violations (this PWS)
- 21
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Graham County Utilities - Pima standing, high SDWIS violation third
3,799 people served (SDWIS) - larger served population (> 3,309). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 14% is middle-third health share (≤ 23%). Population rank #9,181 of 29,740 among systems serving 500+.
The verdict
Graham County Utilities - Pima sits in the upper third of the sitemap cohort by violation count (152), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (3,799; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 14% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #9,181 of 29,740
- Population · /systems
- #138 of 413
- Population · AZ
- 152
- Total EPA violations on record
- 14%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 1,632
- County
- Graham
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 98
- Treatment Tech Violations
- 21
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Chlorine | MR | 35 | 2022 |
| Coliform (TCR) | MR | 25 | 2016 |
| Groundwater Rule | TT | 21 | 2025 |
| Total Haloacetic Acids (HAA5) | MR | 15 | 2020 |
| Consumer Confidence Rule | Other | 15 | 2025 |
| TTHM | MR | 14 | 2020 |
| Public Notice | Other | 7 | 2023 |
| Revised Total Coliform Rule | RPT | 4 | 2021 |
| Revised Total Coliform Rule | MON | 4 | 2021 |
| Lead and Copper Rule | MR | 3 | 2021 |
| Nitrate | MR | 1 | 2005 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1980 |
Violation Count vs. the National Corpus
Graham County Utilities - Pima has 152 recorded EPA violations, 81% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 19% carry more. 14% of this system's own violations are health-based (21 of 152), and it ranks #9,181 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
152 Higher than most more violations than 81% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Population served record for Graham County Utilities - Pima
EPA SDWIS lists 3,799 people served and 1,632 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS · Arizona DEQ, Drinking Water Program
Nationwide peers
152 violations · 3,799 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Graham County Utilities - Pima
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Arizona compares on the same EPA violation measures. Arizona systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.